fix GraphQL exception (#17274)

Author: rachmari

middleware/contextualizers/graphql.js

@@ -9,14 +9,17 @@ const explorerUrl = process.env.NODE_ENV === 'production'
   : 'http://localhost:3000'
 
 module.exports = async (req, res, next) => {
+  const currentVersionObj = allVersions[req.context.currentVersion]
   // ignore requests to non-GraphQL reference paths
-  if (!req.path.includes('/graphql/')) return next()
-
+  // and to versions that don't exist
+  if (!req.path.includes('/graphql/') || !currentVersionObj) {
+    return next()
+  }
   // Get the relevant name of the GraphQL schema files for the current version
   // For example, free-pro-team@latest corresponds to dotcom,
   // enterprise-server@2.22 corresponds to ghes-2.22,
   // and github-ae@latest corresponds to ghae
-  const graphqlVersion = allVersions[req.context.currentVersion].miscVersionName
+  const graphqlVersion = currentVersionObj.miscVersionName
 
   req.context.graphql = {
     schemaForCurrentVersion: require(`../../lib/graphql/static/schema-${graphqlVersion}`),

middleware/contextualizers/webhooks.js

@@ -5,14 +5,18 @@ const nonEnterpriseDefaultVersion = require('../../lib/non-enterprise-default-ve
 const allVersions = require('../../lib/all-versions')
 
 module.exports = async (req, res, next) => {
-  if (!req.path.includes('webhook')) return next()
+  const currentVersionObj = allVersions[req.context.currentVersion]
+  // ignore requests to non-webhook reference paths
+  // and to versions that don't exist
+  if (!req.path.includes('webhook') || !currentVersionObj) {
+    return next()
+  }
 
   // Get the name of the dir under lib/webhooks/static
   // For example, free-pro-team@latest corresponds to dotcom,
   // enterprise-server@2.22 corresponds to ghes-2.22,
   // and github-ae@latest corresponds to ghae
-  if (!allVersions[req.context.currentVersion]) return next()
-  const webhookPayloadDir = allVersions[req.context.currentVersion].miscVersionName
+  const webhookPayloadDir = currentVersionObj.miscVersionName
 
   const webhookPayloadsForCurrentVersion = webhookPayloads[webhookPayloadDir]